Can someone help me answer this I don’t get it. thanks if u help me :)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

What is the volume of this container?